on death:
    attacker is player:
        exeucte console command "/execute %attacker% ~ ~ ~ /particle hugeexplosion ~ ~ ~ ~ ~ ~ 1 3 force @p
        message "&ckill!" to atacker
        add 1 to {kill-%uuid of player%}

command /kills [<player>]:
   if arg-1 is not set:
        send "&bkill数&d>>>&c%{kill-%uuid of player%}%"